Use sys.exit rather than raise SystemExit

win_toolchain/toolchain2013.py

 #!/usr/bin/env python
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Extracts a Windows VS2013 toolchain from various downloadable pieces."""
 
 
 import ctypes
 import optparse
@@ skipping 75 matching lines @@
     while True:
       chunk = req.read(1024 * 1024)
       if not chunk:
         break
       bytes_read += len(chunk)
       file_handle.write(chunk)
       sys.stdout.write('... %d/%d%s' % (bytes_read, content_length, terminator))
       sys.stdout.flush()
   sys.stdout.write('\n')
   if content_length and content_length != bytes_read:
-    raise SystemExit('Got incorrect number of bytes downloading %s' % url)
+    sys.exit('Got incorrect number of bytes downloading %s' % url)
 
 
 def ExtractIso(iso_path):
   """Uses 7zip to extract the contents of the given .iso (or self-extracting
   .exe).
   """
   target_path = TempDir()
   sys.stdout.write('Extracting %s...\n' % iso_path)
   sys.stdout.flush()
   # TODO(scottmg): Do this (and exe) manually with python code.
@@ skipping 42 matching lines @@
       'Running sdksetup.exe to download Win8 SDK (may request elevation)...\n')
   count = 0
   while count < 5:
     rc = os.system(target_path + ' /quiet '
                    '/features OptionId.WindowsDesktopDebuggers '
                    '/layout ' + standalone_path)
     if rc == 0:
       return standalone_path
     count += 1
     sys.stdout.write('Windows 8 SDK failed to download, retrying.\n')
-  raise SystemExit("After multiple retries, couldn't download Win8 SDK")
+  sys.exit('After multiple retries, couldn\'t download Win8 SDK')
 
 
 def DownloadUsingGsutil(filename):
   """Downloads the given file from Google Storage chrome-wintoolchain bucket."""
   temp_dir = TempDir()
   assert os.path.basename(filename) == filename
   target_path = os.path.join(temp_dir, filename)
   gsutil = download_from_google_storage.Gsutil(
       download_from_google_storage.GSUTIL_DEFAULT_PATH, boto_path=None)
   code = gsutil.call('cp', 'gs://chrome-wintoolchain/' + filename, target_path)
   if code != 0:
-    raise SystemExit('gsutil failed')
+    sys.exit('gsutil failed')
   return target_path
 
 
 def GetVSInternal():
   """Uses gsutil to pull the toolchain from internal Google Storage bucket."""
   return DownloadUsingGsutil('VS2013_RTM_PRO_ENU.iso')
 
 
 def GetSDKInternal():
   """Downloads a zipped copy of the SDK from internal Google Storage bucket,
@@ skipping 185 matching lines @@
     CopyToFinalLocation(extracted, target_dir)
 
     GenerateSetEnvCmd(target_dir, not options.express)
   finally:
     if options.clean:
       DeleteAllTempDirs()
 
 
 if __name__ == '__main__':
   sys.exit(main())